For the uninitiated, Lego Cuusoo is a forum for brick fans to submit, and vote on, potential sets that may one day make it to a Lego store near you. And the fifth set to rise through the ranks of the internet, the Lego Mars Curiosity Rover ($30), is equally as impressive as the initial four. Modeled from a set designed by a real NASA engineer, the rover is ready to tackle any challenges it faces on the Red Planet, with six-wheel suspension, an articulated robot arm, and plenty of places to mount a camera. It's the perfect toy for any space buff, or for the adult collector who couldn't stand to let one of these coveted sets slip through his fingers.